class A():
    def __init__(self):
        pass

    def save(self):
        print("This is from A")


class B(A):
    def __init__(self):
        pass


class C(A):
    def __init__(self):
        pass

    def save(self):
        print("This is from C")


class D(B, C):
    def __init__(self):
        pass

print(D.__mro__)

fun = D()
fun.save()
